The original website for Nortek (nortekonline.com) is not working as per time of writing. It says "This webpage is not available" on my Chrome browser.

Using archive.org's website history tool I managed to find the product page for Nortek NX Vega series of webcam dated back to year 2010. However upon clicking on the Download link I was redirected to a login page. Apparently Nortek requires one to "register and get software, drivers, updates, manuals and technical assistance for your Nortek products.".